HT49R50 Holtek Semiconductor Inc, HT49R50 Datasheet - Page 48

• Manufacturer Part Number: HT49R50
• Description: 8-Bit Microcontroller
• Manufacturer: Holtek Semiconductor Inc

SNZ [m].i
Description
Operation
Affected flag(s)
SUB A,[m]
Description
Operation
Affected flag(s)
SUBM A,[m]
Description
Operation
Affected flag(s)
SUB A,x
Description
Operation
Affected flag(s)
Skip if bit ²i² of the data memory is not zero
If bit ²i² of the specified data memory is not zero, the next instruction is
skipped. If bit ²i² of the data memory is not zero, the following instruction,
fetched during the current instruction execution, is discarded and a dummy
cycle is replaced to get the proper instruction (two cycles). Otherwise proceed
with the next instruction (one cycle).
Skip if [m].i¹0
Subtract data memory from the accumulator
The specified data memory is subtracted from the contents of the accumula-
tor, leaving the result in the accumulator.
ACC ¬ ACC+[m]+1
Subtract data memory from the accumulator
The specified data memory is subtracted from the contents of the accumula-
tor, leaving the result in the data memory.
[m] ¬ ACC+[m]+1
Subtract immediate data from the accumulator
The immediate data specified by the code is subtracted from the contents of
the accumulator, leaving the result in the accumulator.
ACC ¬ ACC+x+1
TC2
TC2
TC2
TC2
¾
¾
¾
¾
TC1
TC1
TC1
TC1
¾
¾
¾
¾
TO
TO
TO
TO
¾
¾
¾
¾
PD
PD
PD
PD
¾
¾
¾
¾
48
OV
OV
OV
OV
¾
Ö
Ö
Ö
¾
Z
Z
Ö
Z
Ö
Z
Ö
AC
AC
AC
AC
¾
Ö
Ö
Ö
¾
C
C
C
C
Ö
Ö
Ö
August 18, 1999
HT49C50